package ynu.edu;

import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Component
public class AuthGlobalFilter implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        // 获取Authorization头
        String authHeader = exchange.getRequest().getHeaders().getFirst("Authorization");
        // 简单校验：必须为 Bearer token123
        if (authHeader == null || !authHeader.equals("Bearer token123")) {
            // 拦截并返回401
            exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);
            return exchange.getResponse().setComplete();
        }
        // 放行
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return -1; // 优先级高
    }
} 